Postgresql page

content/docs/postgresql.md

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+---
+title: "Postgresql"
+weight: 1
+# bookFlatSection: false
+# bookToc: true
+# bookHidden: false
+# bookCollapseSection: false
+# bookComments: false
+# bookSearchExclude: false
+---
+
+# Postgresql
+*On this page, `$` means the command must be run as a user with adequate rights such as the `postgresql` user.*
+
+## Filesystem preparation
+In case a Btrfs filesystem is used, Copy-on-Write should be disabled first.
+
+## Initial setup
+
+The database can be initialized using the following command. Locale defaults to current environment locale.
+```
+$ initdb --locale C.UTF-8 --encoding=UTF8 -D /var/lib/postgres/data --data-checksums
+```
+
+Postgresql can then be started using the `postgresql` systemd service.
+
+## Usage
+### Creating users
+
+The following command can be used:
+```
+$ createuser [--interactive]
+```
+
+Additionnal options can be used to give permissions to the user (usually not needed).
+
+Users can be deleted using the following command:
+```
+$ dropuser [-i/--interactive] [user]
+```
+
+### Creating databases
+
+The following command can be used:
+```
+$ createdb [-O owner] [dbname [description]]
+```
+
+## Sources
+
+1. <https://wiki.archlinux.org/title/PostgreSQL>